Structured noise

Control-induced variability (structured noise)
Fluctuations deliberately maintained by regulatory systems (e.g., stochastic resonance, immune repertoire diversity, synaptic variability). This is not destructive but functionally advantageous, enabling systems to explore state space, avoid brittle optimization, and sustain adaptability.

It represents a designed or emergent cybernetic feature, where variability is cultivated to enhance resilience. In fact, structured noise is a hallmark of Covolutionary systems, which propagate not by eliminating uncertainty but by harnessing it into self-optimizing attractors.